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2019 Fiscal Year Final Research Report

Elucidation of pathogenesis of intractable asthma by analyzing immunological mechanisms of IL-33 production

Research Project

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Project/Area Number 17K08326
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Pharmacology in pharmacy
Research InstitutionSetsunan University

Principal Investigator

Nabe Takeshi  摂南大学, 薬学部, 教授 (40228078)

Co-Investigator(Kenkyū-buntansha) 松田 将也  摂南大学, 薬学部, 助教 (30783005)
Project Period (FY) 2017-04-01 – 2020-03-31
KeywordsIL-33 / 喘息 / アトピー / ステロイド / 2型自然リンパ球 / ステロイド抵抗性
Outline of Final Research Achievements

Allergic mechanisms underlying IL-33 production and roles of IL-33 in intractable asthma were analyzed. In antigen-induced IL-33 production in the lung of sensitized mice, mechanisms of incorporation of antigen-IgG antibody complex into alveolar macrophages were involved. On the other hand, in steroid-resistant asthma model that were developed by us as an intractable asthma model, IL-33 production was steroid-sensitive, whereas infiltration of IL-33 receptor-possessing type 2 innate lymphoid cells into the lung was steroid-resistant. Furthermore, expression of IL-33 receptor gene was up-regulated in the lung. In conclusion, IL-33 receptor activation rather than IL-33 production should be involved in the pathogenesis of intractable asthma.

Free Research Field

免疫薬理学

Academic Significance and Societal Importance of the Research Achievements

喘息は吸入ステロイドによってコントロール可能であるとされるが、薬物治療を受けている喘息患者の5-10%はステロイドに抵抗性であるとされる。本研究成果により、ステロイド抵抗性のような難治性喘息の発症には、IL-33の受容体の発現増強を介した機序が存在することが示唆された。したがって、IL-33受容体の遮断や受容体作用後のシグナル伝達を遮断するような薬物が、難治性喘息の治療薬となり得る可能性が考えられた。本研究の成果は、難治性喘息に対する新しい治療薬の開発に資するものである。

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Published: 2021-02-19  

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